Valve device for heating systems.



PATE'VNTED JUNE 9, 1905. KINEALY.

4 SHEETS-SHEET l.

APPLICATION FILED APB. 10,1903.

VLVB DEVGE FOR HEATING SYSTEMS.

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PATENTED JUNE 9, 1908.

4 sHEETsvsHEET 2.

No. 890,239.V

' yJ. E. KINEALY.

VALVE DEVICE EOE HEATING SYSTEMS. APPLICATION FILED APR..10,1903

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PATENTED JUNE. 9, 1908,

NEALY.

VICE POR HEATING SYSTEMS.

VALVE DE APPLICATION FILED APR10,1903.

4 SHEETS-SHEET 3 llllilllll NQQQQSQ. l E'TE-TED 'INBQE 1908 A 3'. H'.KINEALY,

VALVE DEVE FOR HETNG- SYSTEMS.

APPLICATION FILED APR. 10,1903.

4 SHEETS-SHEET Wfl/M;

A @51.1 aw,

heater or radiator, thus enabling UNITED STATES ATENT OFFTGE.

JOH H. KINEALY. QF BOSTON, MASSACHUSETTS, ASSIGNOR, BY'MESNEASSIGNMENTS, T0

ANDREW G. PAUL, Oi"

BOSTON, MASSACHUSETTS.

Specication of Letters Patent.

Patented June 9, 1908,

Appneatiun iiiednprii io, i903. 'serial No. 152,008.

To all whom. 'it may concern:

Be it known that I, JOHN H, KiNEALv, a citizen of the United States,residing in Boston, in the county of Suiiolk and (State ot'Massachusetts, have invented a new and useful Improvement in ValveDevices for Heating Systems, oi which the following is a full, clear,and exact specification, reference being had to the accompanyingdrawings, which form a part hereof.

My invention relates to attachments for heating systems in whichl steamis used as the heatinu medium.

It relates to that form or type of system in which the water ofcondensation and the air` are removed through the return or dischargepipe, as distinguished from thattype of system in which the air separateair pipe.

The object of my invention is to prevent the passage of a substantial ormaterial amount of steam from the heater or the radiator into thedischarge pipe, while allowing air and water to be discharged from thethe heating to be done more economically, and allowing theuse oi"smaller pipes for supplying the steam to the heaters or radiators, andfor discharging tlie air and water therefrom, and making it easier tomaintain a high vacuum in the discharge pipe because of the absence ofany material amount of steam in said pipe. Another object of myinvention is to enla'blesteam to be used or maintained at di'l'erentpressures in the ditierent heaters or radiators, the steam beingsupplied to the said heaters or radiators from the saine main steamsupply, pipe. A

Another object of my invention is to provide a simple and serviceableautomatic valve for use on the return pipe of the heating system whichcan be readily applied to any ordinary steam heating system now in useand and'reliable in its operation,

which will operate efficiently to permit of the discharge of air andWater while preventing the loss of any substantial amount-of steam.

Another object of my invention is to enable the valve to be readilyopened so that it can be cleaned or freed from any obstruction.

Another object of my invention is to pro- .vide a valve which can beeasily and eeonoinwill be certain and which will ,not be liable to getout of order.`

icallymanufactured, which is removed through a invention consists irstin a valve for use in a heating system compris- My device ing a valvecasing of any suitable form or description, a discharge port throughwhich the water is discharged, a valve or valve piece controlling thesaid port, a iiuid pressure motor, such as a piston or a diaphragm,controlling the valve piece, the casing being provided with a iiuidpressure chamber on `one side of the motor, an equa-lining passageconnecting the iluid pressure chamber and the inlet side of the valve ofsuch form or size that it will permit air and steam to flow through itand a small quantity oi' water when the lower end of the passage hasbeen sealed or closed by the accumulation of a body of water in thecasing, a second passage connecting the fluid pressure chamber with anescape pipe, the second passage being so constructed as to otler greaterresistance to the ilow than the equalizing passage, whereby when theequalizing passage is, sealed by an accumulation oi water a smallquantity oit' water will pass through it into the tluid pressurechamber, but the iiow of this water through the equalizing passage willbe so retarded that the pressure in the fluid pressure chamber willbecome less than the pressure on the inlet side of the motor, as aresult of which 'the motor will be moved and the valve opened, so as todischarge the water, and whereby when 'they water has been dischargedthe valve will close. in the best form of the invention the secondpassage is so arranged as to be connected with the lower part of theiiuid pressure chamber, either during the entire time or when the motoris in a raised position, and this passage is adapted to be restricted incapacity when the motor is raised.

My invention also consists in making thev equalizing passage ass throughthe body of the motor itself an( extend downia suiicient distance sothat its lower end will be sealed when a suicient amount of wateraccumulates in the valve to make it advisable to cause the discharge ofthe saine.

My invention also consists in causing. the second passage to extendthrough the motor so as to' connect the fluid pressure chamber with thedischarge pipe.

:My invention also consistsin providing the casin with a rejection soarranged as to form t e secon passage connecting the luidfpressurechamber with the escape pipe, which assage operates as alreadyexplained. In the est form of my invention this proj ection is a plug soarranged that it projects into the second passage and tends to restrictthe same in size and to retard the flow therethrough. The plug is madeadjustable so that it can be caused to project more or less into thissecond passage and so that it can be moved out sufficiently to cause thevalve to open fullyfor the purpose of cleaning or.,

for any otherpur ose.

My invention a so consists in providing a secondary chamber into whichthe second passage leads and in connecting the second chamber with anescape pipe. In the best f form of my invention the secondary chamber ythe equalizlngl passage.

Figure 1 shows a steam heating system in which an ordinary hand valve isused in the 'supply pipe, and the discharge pipe of which is providedwith my improved automatic valve device, and is connected to a receiveror trap, and an exhauster is also connected to the receiver or trap;Fig. 2 shows a similar steam heating system having the additionalfeature of a valve on the supply pipe controlled by a thermostat; Fig. 3shows `a steam heating system in which no receiver is used, but theexhauster is connected directly with the end of the discharge pipe; Fig.4 shows a system having two heaters or radiators, each provided with anordinary valve in the supply pipe and the automatic valve device in thedischarge pipe, the main discharge pipe being connected to a receiverwhich yis open to the atmosphere; Fig. 5 is a vertical cross-sectionalview of one form or embodiment of my improved valve device; Figs. 6, 7,8, and 9 show other forms or modifications of my improvedvalve device.

Si ilar numbers indicate similar parts in the if'terent figures. i

Referring to Fig. 1, 1 is a heater or radiator;"2 is a supply pi e; 3 isa discharge pipe; 4 is my improve lvalve device which 1s placed on thedischarge pipe; 5 is a receiver or trap into which the Water andthe airpass which'escape from the heater or radiatorthrough the valve device;'Z is a pipe connecting the receiver with the vatmosphere, and 6 is asuitable valve on the said pipe; 8 is a pipe through which the water maybe discharged or drawn oli" from the receiver or trap and caused to iiowt'o the boiler. or elsewhere7 as may be desired.

9 is an ordinary hand valve on the supply 70 pipe; 10 is an exhauster orexhausting device of any suitable form, such as a pump orI a fan or anejector.

The exhausting device is connected with the receiver or trap 5 by meansof a pipe 75 which is provided with any suitable form of valve 22; 23 isa ipe by which cold water may be introduce into the receiver or trap tocondense any vapor thereinv when it 1s desirable; this ipe is provided'with any 80 suitable form or valve. The valve 6 on the pipe 7 ispreferably a check valve thatwill open outward, but will not openinward, and that will thus prevent the pressure in the receiver or trapfrom exceeding that of the atmosphere while allowing it to be less thanthe atmosphere.4 j

One form of m improved construction of the automatic va ve device 4 isclearly shown in Fig. 5. Referring to this figure, 11 yis a 90 valvecasing; 12 is a fluid pressure motor connected with and operating avalve piece 20, which controls an outlet or discharge port 19. The upperpart of the casing is fitted with a ca ,13 which is fastened to thecasing by suita le screw-threads, as shown, or in any other way. Thisforms, in the upper part of the casing, a fluid pressure chamber 14above theiiuid pressure motor.A The form 'of iiuid pressure motor usedin this valve -is a pistonwhich is iitted to the casing so as to move upand down readily in the casing, but not to permit any substantial amountof air or steam to escape past the piston between the piston and thewall of the casing. rlhe piston is provided with a projecting portion 15extendingdownwardly and carrying at its lower end the valve piece 20.

16 is an equalizing passage extendingllo through the motor and throughthe downwardly projecting portion 15 so that'the lower end of thisequalizingpassageis adapted to be closed orsealed by an accumulation ofthe water of condensation in the casing. This equalizing passageconnects the fluid pressure'chamber 14 with the inlet side of the valve,and'is made of such a sizeas to permit air and steam to iiow through itfrom the inlet side tothe luidpressure chamber, 120 and also to permitsome Water to ilow through it afterits lower end has been sealed,'asalready explained.' 17 is .anotherpassage through the dcwnwardlyprojecting portion of the fluid ,pressuremoto1', which operates as anescape pipe to permit the escape of air, and water from the iluidpressure chamber 14 to the discharge pipe 3. 18 is a plug supported bythe casing. vinthe form shown the plug is provided with a screw-threadwhich takes into a screw-thread in the cap 13. In this way the plug ismade adjustable so that it can be moved up or down relatively to the cap13.

' 21 is a small cover or cap which is screwed or otherwise suitablyvfastened to the cap 13, and serves to protect the plug 18 and preventits being interfered with after it has been once adjusted. The upper endot the passage 17 is enlarged so as to form a seeondary chamber 24 in.the motor. The lower end oi the plug 18 in its normal position projectsdownwardly into the secondary cham- -ber 24, and is thus arranged soasto form a passage 25 connecting the fluid pressure chamber with thesecondary chamber. 24. The passage 25 is smaller than the equalizingpassage 16, and is of such a size as t-o oil'er greater resistance tothe iiow than the equalizing passage. ',It will be seen that in thisconstruction the passage 17 is an escape pipe with which the passage25connects the fluid pressure chamber through the secondary chamber 24.When the piston 12 rises, the passage 25 between the piston andthe plugyis increased inllength, and is thereby restricted in capacity when themotor is raised. It will be seen, also, that the passage 25 is soarranged as to be connected with the lower part of the fluid pressurechamber 14 when t-he motor is in its raised position well as when themotor is in its lowest position. 26 is the inlet port of the valve.

'n the best form of the valve devi-ce, the iiuid pressure motor isinade'to work easily and with a slight difference of pressures on itsupper and lower sides; the equalizing passage 16 is fairly large so asto permit the easy flow of air and steam and ci some portion of thewater from the inlet side o'l the valve casing into the fluid pressurechamber `14; the passage 25 must be large enough yto permit the' passageof water from the Huid ressure chamber 14 to the secondary chamlier 24,but to somewhat retard the flow of the water between these two points.

The operation of the valve device is as ioll`ows: When the pressure inthe heater or radiator is greater than that which exists in thedischarge pipe, any air which may be in the heateror radiator is forcedout and into the valve casing through the inlet` port 26; then it passesthrough the equalizing passage 16 into the fluid ressure chamber 14, andfrom there througi the passage 25 into the secondary chamber 24, andfrom there through the passage 17 into the discharge pipe. When steamenters the heater or radiator and is condensed,..the water oicondensation iiows into the valve casing through the inlet port 26, andgradually ac-. 'cumulates therein until it iills the bottom art of theeasing and seals or closes the ower end ot the equalizing passage 16. Asa result of this, the pressure 1n the' fluid `pressure chamber 14 willbecome less than the ressure in the upper part of the valve casing belowthe iluid pressure motor, and the pressure in the secondary chamber 24will also be less than the pressure underneath the liuid pressure motor.The iluid pressure motor will, therefore, rise, lifting the valve piece20, and will thus open the outlet port 19 and allow the water to passfrom the lower portion ol the valve rising into the. discharge pipe.Some water will pass up through the equalizing passage 16 into the iiuidpressure chamber 14, and will collect on top of the. iluid pressure.motor. 'hcn the motor rises, the lower end ol' the equalizing passage 16will lie opened or unsealcd,'and as a result of this, the pressure inthe lluid pressure chamber 14- will become. equal to that which existsin the valve casingr underneath the motor. At this time the water whichhas passed through thc cqualizing passage 16 into the lluid pressurechamber 14 is llowing through the passage. 25. The size oi thc passage25 is such that the escape oi" this water through the same is retarded.As a result ol" this operation, the l'all ol the lluid.

vpressure motor and the closing ol' the outlet port l) are retarded,When all, or a portion oiI theI watcrfavhich lowcd through thc passage16 into the [luid 'pressure chamber 14 has escaped through the passage25, the valve closes.

ln actual operation with the valve. properly adjusted when the sizes oi'the vlluid pressure motor 12, the equalizing passage 16, the passage 25and the`sccondary chamber 24 arc properly i'iroportioncd, the iluidpressure motor will not operate to open the outlet port 19, when onlyair or steam without Water comes to the valve device, but when pressuremotor operates, as described, lto allow the water to pass into thedischarge pipe without allowing any mate-rial amount of steam to passwith it. The amount which the valve device 20 is lifted, and the extentto which the outlet port is thereby opened, are automatically regulatedwith'rct'crence to the amount of water coming to the valve device. Theinfluence of the secondary, chamber upon the operation of the iiuidpressure motor depends upon its size and upon the weight of the fluidpressure motor and. the parts attached to it. lf the'secondary chamberbe made so small as to be simply a continuation of the passage 17, thenits iniiuence upon the operation of the motor is apt A to be small, andthe beneiit of the construction may be entirely due to thc passage 25,the eiiect of which is automatically controlled by the condition of theiluid passing through it. By adjusting the plug 18, that is, by movingit up or down relatively to the normal position of the motor 12, thearea or capacity of. the passage 25 can be varied.

`water comes to thel valve device tho vfluid The further down the lug ismoved, .the longer the passage will) become, and 'the greater will bethe retarding eect which it produces upon the flow of water through thesame. The plug is adjusted at the start to meet the conditions of thesystem, and its position need not be altered thereafter during theoperation of the device. If it becomes desirable to open the valve widein order to clean the same, this can be done by unscrewing the cap 21and unscrewing the charge pipe discharges into a receiver or. trap,

5. The exhauster-10 is connected with the 25 receiver',y and operates toproduce a vacuum 1n the receiver 5 and in the discharge pipe 3. n

By employing the exhauster and producing a vacuum in the discharge pipe,the radiators or heaters can be run at any pressuredesir'edv below orabove atmosphere, and different radiators can berun at dierentpressures.

In the system shown in Fig. 1, the vair is with,

drawn from the system throughthe receiver or trap 5 and exhauster 10,and the water is withdrawn or discharged through `the pipe 8 by "any'suitable means. y

` Referring to Fig. 2, the parts are the same as already described inconnection with Fig.

1, except that the supply valve 9 is operated room or in any othersuitable location. Any suitable .or well known arrangementV of vthethermostatyan'd su ply valve may be used 'for this purpose. n thedrawing Ih'ave represented a supply valve controlled by a diaphragm/andapipe running yfrom this diaphragm to the thermostati27 and continuingfrom the thermostat to an exhauster or to a source of Huid underpressure. The ex- 50 hauster or source of iiuid under pressure is notshown in the drawing. The thermostat.

can bemade to open and close the pipe by 'anyy well knownmeans,operating when it closes the pipe to at the same time, open a vent tothe .chamber above the diaphragm.

I have not shown the details of construction f inv this iigure as ltheyare well known in thisart, and separately considered form no part of myinvention.. Moreover, this part o my invention is not limited to Nany.particular construction or arrangement of supply valve and thermostat.i.

In Fig. 3 I have shown a systemthe same as that shown in Fig. 1, exceptthat the discharge pipe 3 is connected directly with the' l by athermostat 27 placed on the wall of the In Fig. 4 I have shown a systemhaving v71) i two or more radiators, each lradiator being provided withone of my improvedfauto# matic valve devices 4', as shown. The upperradiator in this figure is yprovided witha supply pipeattached to the toof the radiator,l

whereas the lower radiator as a supply connection leading to the bottomof the radiator. In this system, no exhauste'r is used, as the system isintended .to be operated under pressure.` The air and water pass intothe receiver or trap 5, from whichthe air escapes through the pipe 34,and the water is discharged through the pipe 8.

In Fig. 6 I have shown a modification of my automatic valve device.In'this form of 35 my improved valve, the motor 12 isfmade in the formof a diaphragm, which is vsupported in any suitable manner at its edgebetween the casing 11 and thecap 413. The@ \dia hragm is attached in anysuitable way at t e center thereof to the downwardly projecting part 15,which carries at its lower end the valve piece 20X This valve operatesin substantially the Same manner as the valve.

shown in Fig. 5.

In Fig. 7 I have shown another modification of myimproved valve device,differing from the valve shown in Figs. 5 'and- 6 in the respect thatthereis no passage 17 through the downwardly projecting part of themotor. In place of this passage there is an escape pipe 28 connectedwith the topof the plug'SS, and there is a passage through the plugconnecting the escape pipe with the secondary chamber 24. In thisconstructionI prefer to connect the escape pipe 28 withan exhauster.This valve operates in substantially the same manner as alreadyexplained, except that the air and water whichpass into the chamber 24instead of escaping 110 downwardly into the discharge pi e 3,.es capethrough, or are drawn throng the escape pipe 28.

,In Fig. 8 I have shown another modifica- ...tion of my improved valyedevice diHering Jfrom the valve shown in Fig. v5 only in respect-to theparticulafconstruction and arrangement .of the plug 18. In thismodification the plug 18 extends through a bearing in the cap 13 and ismovable up and down in 120- that bearin by means of the thumbfpiece 29.The ug issurrounded by 'a coiled spring 30 bearing at its upper endagainst t e cap 13 and bearin at its lower end against la collar on .thep ug 18. The spring 30 operates to hold lthe plug downin its normalposition, but when it is desired to o en the valve in order to -cleanitor for any ot ,er osetl;;eplug 18 vcan be raised by means 'of t e.thumb-piece 29.,.and-when this is done 13o In Fig. S) lhave shownanother' modilica tion of my improved valve device.

ln this form of my invention the cap 13 of the. casi ing is providedwith hollow plug' or projectron extending' downwardly as shown.

The motor is provided with an upwardly eX- i tending projection 31between which and the projection 35 a second passage is formed as shown.

."2 is a secondary chamber which in this case is in the plug orprojection 35 and this chamberv is connected with an escape pipe 2Spassing thrrargh the top of the casing'. rlhis form of valve operates insubstantially the same. manner as the form of valve shown `in Fig. 7. i

It will be obvious that some of the details rif my invention ma y bechanged in construction, and that the parts may be somewhat dilferentlyarranged from what is shown in the drawings.

Sonie ol the advantages'ot my invention are as follows. 'lhe air isr'emoved quickly f and certainly whenever' it enters or collects in theradiator'. 'lhe water is removed quickly and certainly whenever' itaecumulates in any substantial quantity in the casing'of the valve. Nosubstantial amount of steam is lost or wasted through the dischargepipe. The valve works automatically, according to the rmjuir'ernents olthe 'particular radiator' to which it is attached. 'lhe valve issimpleand durable in construction, and is not likely to get out olI or'der orto need r'epairing. The valve is practically noiseless 1n itsopr'r'ration. 'lhe valve is economical to manufacture, and is certain inits operation.

In my irnpr'oved system, the. dill'erent radiators can beI operatedsuccessfully at ver'y low pressures, thereby producing great econonly inthe consumption ol' steam. 'lhc operation ol the separate radiators canalso be separately controlled so as to vary the pressur'e in the.dill'er'eut radiators according to the requirements oll the system.

illy inr'prr)vernents can be very easy and economically applied to oldfsystems that have previously operated under pressure.

'Vhat l. claim as new and desire. to secure by lietters Patent, is:

l. A valve device comprising a valve casing, a discharge port l'or' thewater, a Valve 'piece controlling the port, a lluid pressuremotorcontrolling the valve piece, the casing being' provided with a luid'pressure chamber' o one side olI the. motor', an equalizing passageconnecting the lluid pressure chamber' and the inlet side oll the valveadapted to permit the llow through il ol' air and stefalrr and somewater, a second passage connecting the Huid pressure chamber' with anescape pipe, and adapted 'to be restricted in capacity when the motor israised.

'2. A valve device .comprising a valve cas ing, a discharge port for thewater, a valve piece controlling the port, a fluid pressure motorcontrolling` the valve piece, tihe casing being provided with a fluidpressure chamber on one side ol' the motor, an equalizing passageconnecting the fluid pressure chamber' and the inlet side of the valveadapted to permit the flow through it of air and steam and 'some water,a second passage connecting the. iluid pressure chamber with an escapepipe, and so arranged as to be connected with the lower' par't ol'v thefluid pressure chamber' and restricted in capacity, when the motor israised, substantially as set forth.

3. A valve device comprising a valve casing, a discharge port for thewat r, a valve piece' controlling the port, a fluid pressure motorcontrolling' the valve piece, the casing being provided with a Huidpressure chamber on one side of the motor, an equalizing assage throughthe motor connecting the uid pressure chamber' and the inlet side oi'the valve and adapted to be sealed byan accumulation of liquid in thecasing', a. second assage through the motor connecting the uid pressurechamber' with the discharge pipe, the second passage being smaller' thanthe equalizing passage and ol' suelta size as to permit the escape ofair but to' retard the escape oi water, and being adapted-,to berestricted in capacity when the motor israised, substantially as setlforth.

4. VA valve device. comprising a valveicasing, a discharge port for theWater;V a valve piece controlling' the port, a fluid pressure motorcontrolling' thel valve piece, the casing being prnvided with a lluidpressure chamber on one side ol' the motor, an equalizing passageconnecting the fluid pressure chamber' aml the inlet side oll the valveadapted to permit the Ilovv through it ol the air and steam and somewater, a projection i suppor'ted by the casing, a second passage betweenthe projection and the motor connecting' the lluid pressure chamber withan escape pipe, and said projection adapted to restrict saidpassage whenthe motor rises, substantially as set forth.

5. A valve device comprising'a valve casing', a discharge port for theWater, a valve piece controlling the, port., a iluid pressure motorcontrolling the valve pieces, the casing being provided with a lluidpressure chamber on one side of themotor, an equalizing passageconnecting the fluid pressure chamber' and the inlet side of the valveadapted to permit the lllow throughit ol' air and steam and some WaterJa second passage through the motor connecting the lluid pressure chamberwith an escape pipe, and a plug supportedl vby the casing and projectinginto the second passage, substantially'as set forth,

6. valve device comprising a valve casing, a discharge port for thewater, a valve piece controlling the port, a fluid pressure motorcontrolling the valve piece, the casingA` Vpiece controlling the port, afluid pressure motor controlling the valve piece, the casing beingprovided with a fluid pressure chamber on one side of the motor, anequalizing passage connecting the fluid pressure chamber and the inletside of the valve adapted to permit the flow through it of air and steamand some water, a second passage through the motor connecting the [luidpressure chamber with an escape pipe, and an adjustable plug supportedby the casing and projecting into the second passage, substantially asset forth.

S. A valve device comprising a valve casiang, a discharge port for thewater, a valve piece controlling the port, a fluid pressure motorcontrolling the valve piece, the casing being provided with a fluidpressure chamber on one side of the motor, anl equalizing assageconnecting the fluid pressure chamber and the inlet side of the valveadapted to permit the flow through it of air and steam and some water, asecondary chamber, a pro-V jection supported by the casing and soarranged as to form a passage between the fluid pressure-chamber and thesecondary chamber smaller than the equalizing passage, and an escapepipe connected with the secondary chamber, substantially as set forth.

9. A valve device comprising a valve easing, `a discharge port for thewater, a valve piece controlling the port, a fluid pressure motorcontrolling the valve piece, the easing being provided with a fluidpressure chamber on one side of the motor, an equa-lizing assageconnecting the fluid pressure chamber and the inlet side ofthe valve adated to permit the flow through it of' air an steam passage,substantially as setv and some water, a secondary chamber in the motor,a plug A.supported by the casingand projecting into the secondarychamber andv so arranged as to forma passage between the fluid pressurechamber' and the secondary chamber smaller than the equalizing passage,and an escape pipe connected with the seeondary chamber, substantiallyas set forth.

10. A valve device comprising a valve casing, a discharge port for thewater, a valve piece controlling the port, a fluid pressure.

motor controlling the valve piece, the, casing being provided with afluidpressure chamber on one side of the motor, an equalizing -passageconnecting the fluid pressure chamer and the inlet side of the valveadapted to permit the flow through it of air and steam and some'water, asecondary chamber inthe motor, an adjustable plug sup orted by thecasing and projecting into t e secondary chamber and so arranged as toform a passage between the fluid pressure chamber and the secondaryvchamber smaller than the equalizing passage, and an escape pipe confber and the inlet side of the valve adapted tol permit the flow throughit of air and steam and some water, a'secondary chamber -in the motor, aplug supported bypthe casing and projecting into the secondary chamberand so arranged as to form a passage between the fluid pressure chamber.and the secondary chamber smaller than the equalizing passage, and apassage through the motor connecting the secondary chamber with thepipe, substantially as set forth.

12. A valve device comprising the valve casing 11, the inlet port 26,the-outlet port 19, the valve piece 20, the fluid pressure motor 12, thefluid pressure chamber 14, the secondary chamber 24, the n plug 18, theeqfualizing passage 16, the passage 25, and the passage 17substantiallyas described.

In testimony whereof, I have signed my name to this specification, inthe presence of two subscribing witnesses.

JOHN H; KINEALY. 1V itnesses ELLA G. BrRTwELL, BERTRAND K. RICHARDSON.

,discharge

